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Ekran-alici/main.cpp

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+#include <QApplication>
+#include <QMainWindow>
+#include <QScreen>
+#include <QPushButton>
+#include <QVBoxLayout>
+#include <QLabel>
+#include <QPixmap>
+#include <QMouseEvent>
+#include <QPainter>
+#include <QClipboard>
+#include <QFileDialog>
+#include <QMessageBox>
+
+class EkranGoruntusuWidget : public QWidget {
+    Q_OBJECT
+
+public:
+    EkranGoruntusuWidget() : secimAktif(false) {
+        setWindowFlags(Qt::Window | Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);
+        setAttribute(Qt::WA_TranslucentBackground);
+        setAttribute(Qt::WA_TransparentForMouseEvents);
+        setCursor(Qt::CrossCursor);
+    }
+
+protected:
+    void mousePressEvent(QMouseEvent *event) override {
+        if (event->button() == Qt::LeftButton) {
+            baslangicNoktasi = event->pos();
+            bitisNoktasi = baslangicNoktasi;
+            secimAktif = true;
+        }
+    }
+
+    void mouseMoveEvent(QMouseEvent *event) override {
+        if (secimAktif) {
+            bitisNoktasi = event->pos();
+            update();
+        }
+    }
+
+    void mouseReleaseEvent(QMouseEvent *event) override {
+        if (event->button() == Qt::LeftButton && secimAktif) {
+            secimAktif = false;
+            ekranGoruntusuAl();
+            close();
+        }
+    }
+
+    void paintEvent(QPaintEvent *) override {
+        if (secimAktif) {
+            QPainter painter(this);
+            painter.setPen(QPen(Qt::blue, 2, Qt::DashLine));
+            painter.setBrush(QBrush(QColor(0, 0, 0, 0)));
+            painter.drawRect(QRect(baslangicNoktasi, bitisNoktasi));
+        }
+    }
+
+private:
+    QPoint baslangicNoktasi, bitisNoktasi;
+    bool secimAktif;
+
+    void ekranGoruntusuAl() {
+        QRect rect(QPoint(qMin(baslangicNoktasi.x(), bitisNoktasi.x()), qMin(baslangicNoktasi.y(), bitisNoktasi.y())),
+                   QPoint(qMax(baslangicNoktasi.x(), bitisNoktasi.x()), qMax(baslangicNoktasi.y(), bitisNoktasi.y())));
+        QScreen *screen = QGuiApplication::primaryScreen();
+        QPixmap ekranGoruntusu = screen->grabWindow(0, rect.x(), rect.y(), rect.width(), rect.height());
+
+        emit ekranGoruntusuYakalanan(ekranGoruntusu);
+    }
+
+signals:
+    void ekranGoruntusuYakalanan(const QPixmap &ekranGoruntusu);
+};
+
+class AnaPencere : public QMainWindow {
+    Q_OBJECT
+
+public:
+    AnaPencere() {
+        setWindowTitle("Ekran Görüntüsü Uygulaması");
+        setMinimumSize(800, 600);
+
+        QWidget *merkezWidget = new QWidget(this);
+        setCentralWidget(merkezWidget);
+        QVBoxLayout *duzen = new QVBoxLayout(merkezWidget);
+
+        QHBoxLayout *butonDuzeni = new QHBoxLayout();
+        QPushButton *btnKopyala = new QPushButton("Kopyala", this);
+        QPushButton *btnKapat = new QPushButton("Kapat", this);
+        QPushButton *btnYenidenAl = new QPushButton("Yeniden Al", this);
+        QPushButton *btnKaydet = new QPushButton("Kaydet", this);
+
+        butonDuzeni->addWidget(btnKopyala);
+        butonDuzeni->addWidget(btnKapat);
+        butonDuzeni->addWidget(btnYenidenAl);
+        butonDuzeni->addWidget(btnKaydet);
+        duzen->addLayout(butonDuzeni);
+
+        ekranGoruntusuEtiketi = new QLabel("Ekran görüntüsü burada gösterilecek", this);
+        duzen->addWidget(ekranGoruntusuEtiketi);
+
+        connect(btnKapat, &QPushButton::clicked, this, &QMainWindow::close);
+        connect(btnYenidenAl, &QPushButton::clicked, this, &AnaPencere::baslatEkranGoruntusu);
+        connect(btnKaydet, &QPushButton::clicked, this, &AnaPencere::kaydetEkranGoruntusu);
+        connect(btnKopyala, &QPushButton::clicked, this, &AnaPencere::kopyalaEkranGoruntusu);
+
+        ekranGoruntusu = QPixmap();
+
+        baslatEkranGoruntusu();
+    }
+
+private:
+    QPixmap ekranGoruntusu;
+    QLabel *ekranGoruntusuEtiketi;
+
+    void baslatEkranGoruntusu() {
+        EkranGoruntusuWidget *ekranGoruntusuWidget = new EkranGoruntusuWidget();
+        connect(ekranGoruntusuWidget, &EkranGoruntusuWidget::ekranGoruntusuYakalanan, this, &AnaPencere::gosterEkranGoruntusu);
+        ekranGoruntusuWidget->showFullScreen();
+    }
+
+    void gosterEkranGoruntusu(const QPixmap &ekranGoruntusu) {
+        this->ekranGoruntusu = ekranGoruntusu;
+        ekranGoruntusuEtiketi->setPixmap(ekranGoruntusu.scaled(ekranGoruntusuEtiketi->size(), Qt::KeepAspectRatio, Qt::SmoothTransformation));
+    }
+
+    void kaydetEkranGoruntusu() {
+        if (!ekranGoruntusu.isNull()) {
+            QString dosyaAdi = QFileDialog::getSaveFileName(this, "Kaydet", "", "PNG Dosyası (*.png)");
+            if (!dosyaAdi.isEmpty()) {
+                if (!ekranGoruntusu.save(dosyaAdi, "PNG")) {
+                    QMessageBox::warning(this, "Hata", "Ekran görüntüsü kaydedilemedi!");
+                }
+            }
+        }
+    }
+
+    void kopyalaEkranGoruntusu() {
+        if (!ekranGoruntusu.isNull()) {
+            QClipboard *panoya = QApplication::clipboard();
+            panoya->setPixmap(ekranGoruntusu);
+        }
+    }
+};
+
+#include "main.moc"
+
+int main(int argc, char *argv[]) {
+    QApplication uygulama(argc, argv);
+    AnaPencere pencere;
+    pencere.show();
+    return uygulama.exec();
+}

Ekran-alici/proje.pro

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+QT += core gui
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = ekran_alici
+TEMPLATE = app
+
+SOURCES += main.cpp